500-230 Online Practice Questions and Answers

Which underlying protocol(s) does LDP utilize to communicate with LDP Peers?

A. UDP and TCP

B. UDP only

C. LDP uses IP Protocol 646 and does not rely on UDP or TCP

D. TCP only

What command is used to manually generate a core dump to aid in troubleshooting a process?

A. context

B. dumpcore

C. exception

D. follow

What is the TRACE command?

A. A packet tracer showing the path of a packet from ingress to egress in the router.

B. The replacement for TraceRoute in IOS-XR.

C. A form of always-on debugging available for a subset of commands.

D. Exactly the same as the debug command, must be explicitly turned on.

Which is required on the CE router in an L3VPN solution?

A. Configure the PE-CE Routing protocol

B. Define the VPN by creating a VRF

C. Assign the PE facing interface to a VRF

D. Configure MPLS forwarding on the interface to the PE router

Which statements are true regarding L3VPN configurations?

A. Prior to configuring a vrf within MP-BGP, the router has to have instantiated the VPNv4 or VPNv6 address-family.

B. On a single PE router, the Route Distinguisher and the Route Targets must be the same.

C. Prior to configuring a neighbor in the VPNv4 address-family, it must already be configured for IPv4Unicast.

D. The import and export Route Targets must be the same on a PE.

What is currently required for eBGP sessions in IOS-XR that was not required in IOS?

A. Default MED values

B. Local-Preference values

C. Send Communities

D. Route-Filter In and Out

How many times are Layer 3 lookups performed on a packet transiting a CRS or ASR9k router?

A. Three times: in the ingress linecard, the fabric, and the egress linecard

B. Once: in the active RP/RSP

C. Once: in the ingress linecard

D. Twice: in the ingress linecard and again in the egress linecard

Which VRFs must be configured on the ASBRs between the two AS'es in an Option B Layer-3 VPN solution?

A. The VRFs shared between the two AS'es plus one VRF representing each AS.

B. The VRFs shared between the two AS'es.

C. The VRFs shared between the two AS'es plus one shared VRF.

D. The VRFs do not need to be configured on the ASBRs.

What is included in a VPNv4 route?

A. IPv4 prefix and Route Distinguisher

B. IPv4 prefix and Route Target

C. MP-BGP prefix and Route Target

D. MP-BGP prefix and Route Distinguisher

Which command removes a user from configuration mode but keeps the user connected to the router?

A. clear line

B. clear session

C. clear commit

D. clear config session